Method for accommodating large movements in a mooring system
a mooring system and large movement technology, applied in the field of mooring devices for mooring vessels, can solve the problems of increasing cost, increasing the risk of mooring system security, and increasing the need to constantly adjust the mooring line, so as to achieve the effect of not risking the security of the mooring system
Inactive Publication Date: 2006-06-06
CAVOTEC MOORMASTER
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Benefits of technology
[0030]It will be appreciated that one of the cups of the each mooring robot is sufficient to hold that portion of the ship moored, during the operation of the above described method. Thus very large vertical movements of a vessel can be accommodated, without the need to re-moor a vessel and without risking the security of the mooring system.
Problems solved by technology
One disadvantage of traditional mooring is the necessity to constantly adjust the mooring lines, particularly when a ship is secured to a fixed dock.
The combination of high tidal movements and variations in ship displacement due to loading can result in a considerable vertical movement having to be accommodated by the mooring system.
This possible movement necessitates a larger working area, with consequent complication and increased cost.
At its limits of travel this passive method therefore offers greatly reduced mooring forces, making the moored vessel vulnerable to failure of the mooring in adverse conditions of weather and current.
The seal of the vacuum cup also suffers from abrasion when the cup slides down the hull in this manner and so to avoid regular sliding movement during operation the mooring device is provided with increased mechanical travel in the vertical direction, with consequent added complication and expense.
Method used
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[0037]Referring to FIG. 1 of the drawings, a device for performing the method of the present invention comprises the first preferred embodiment of a mooring system 500, as described in the co-pending U.S. application Ser. No. 10 / 220,009 which is a national phase of PCT application PCT / NZ01 / 00026 which is based upon New Zealand Patent application No. 501395 is illustrated in plan view. The description of the mooring robot and mooring system in the co-pending application is hereby incorporated by reference.
[0038]Other preferred embodiments (not illustrated) include a mooring system 500 wherein mooring robots 100 are fixed to the ship S allowing the ship S to be readily fastened to a bearing plate fixed to the dock 50 or to another ship S. It will be appreciated, however, that this as well as other robot type mooring devices may be employed for performing the method of the present invention.
[0039]In the following description 100a, 100b have been used to refer to two specific examples o...
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A method of operating a mooring system exemplified by active mooring devices having attractive attachment elements fixable to a ship's hull. Each mooring device includes active means for moving the attachment element vertically and in the horizontal plane, and the method involves repositioning the attachment elements in a stepwise manner. The mooring devices also includes a seal for a vaccum attachment element.
Description
RELATED APPLICATIONS[0001]This application is a National Phase in the United States of PCT / NZ01 / 00025 and claims the benefit of the New Zealand Application 501394 filed Feb. 26, 2000.TECHNICAL FIELD[0002]The present invention relates to mooring devices for mooring vessels and, more particularly to a method and mooring system for accommodating large relative movements between two objects moored or secured together.BACKGROUND ART[0003]One disadvantage of traditional mooring is the necessity to constantly adjust the mooring lines, particularly when a ship is secured to a fixed dock. This adjustment is to account for movement of the ship in response to winds, shifting tides, the addition or removal of cargo, and the like. The combination of high tidal movements and variations in ship displacement due to loading can result in a considerable vertical movement having to be accommodated by the mooring system.[0004]With a mooring device such as that described in the co-pending U.S. applicati...
Claims
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IPC IPC(8): B63B21/00
CPCB63B21/00B63B2021/006
Inventor HADCROFT, JOHN MACKAYMONTGOMERY, PETER JAMES
Owner CAVOTEC MOORMASTER